Port Numbers

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Port Protocol

The more important ones are marked with *

UDP 15 NETSTAT

• TCP 20 FTP data

• TCP 21 FTP control

• TCP 22 SSH

• TCP 23 Telnet

• TCP 25 SMTP

• TCP 53 DNS zone transfers

• UDP 53 DNS queries

• UDP 69 TFTP

TCP 70 Gopher

TCP 79 Finger

• TCP 80 HTTP

• TCP 110 POP3

UDP 111 RPC

• TCP 119 NNTP

• TCP 123 NTP

UDP 137 NetBIOS name service

• TCP 143 IMAP4

UDP 161 SNMP

• TCP 443 HTTPS

UDP 520 RIP

UDP 2049 NFS

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